CVE-2026-89626

Use-after-free via dangling sensor sysfs groups

Published Sep 11, 2026 · Updated Sep 11, 2026

Use-after-free in the HID custom sensor driver in Linux 4.1 and affected later branches allows attackers to cause unspecified impact. During a partial sysfs_create_group failure, hid_sensor_custom_add_attributes returns without deleting groups already attached to the device. Later attribute access follows those surviving groups into the freed sensor_inst->fields array; the failure path and subsequent local sysfs access are required.

CVSS severityUnavailable
Unscored
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the HID custom sensor driver in Linux 4.1 and affected later branches allows attackers to cause unspecified impact. During a partial sysfs_create_group failure, hid_sensor_custom_add_attributes returns without deleting groups already attached to the device. Later attribute access follows those surviving groups into the freed sensor_inst->fields array; the failure path and subsequent local sysfs access are required.

The record

CVE
CVE-2026-89626
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.1
  2. Affected versionversion=4a7de0519df5e8fb89cef6ee062330ffe4b50a4d <3789d0802ddb4b3be04062caf4bfadd23496e9a7
  3. Affected versionversion=4a7de0519df5e8fb89cef6ee062330ffe4b50a4d <79154fad98ee843e5363940841e2d831503c190a
  4. Affected versionversion=4a7de0519df5e8fb89cef6ee062330ffe4b50a4d <d96f8958d4469ac02d9c563686cdd968005b944d
  5. Affected versionversion=4a7de0519df5e8fb89cef6ee062330ffe4b50a4d <f3f37b937a6ea2a00fb5e6189e74f855caa43eb5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.1; version=4a7de0519df5e8fb89cef6ee062330ffe4b50a4d <3789d0802ddb4b3be04062caf4bfadd23496e9a7; version=4a7de0519df5e8fb89cef6ee062330ffe4b50a4d <79154fad98ee843e5363940841e2d831503c190a; version=4a7de0519df5e8fb89cef6ee062330ffe4b50a4d <d96f8958d4469ac02d9c563686cdd968005b944d; version=4a7de0519df5e8fb89cef6ee062330ffe4b50a4d <f3f37b937a6ea2a00fb5e6189e74f855caa43eb5

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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